A processing device for drying steam sludge in a thermal power plant

Abstract

The present invention provides a processing device for drying steam sludge in a thermal power plant, which relates to the technical field of sludge drying equipment and includes an outer box body. A stirring cylinder is arranged inside the outer box body, a stirring column is arranged inside the stirring cylinder, and a plurality of stirring devices are arranged on the stirring column. A stirring driver is arranged on one side of the outer box body, and the output end of the stirring driver is connected to the stirring column. A rotation driver is arranged on one side of the outer box body, and the output end of the rotation driver is eccentrically connected to the stirring cylinder. There is a space for the eccentric rotation of the stirring cylinder inside the outer box body. The outer box body includes a heating layer. In the present invention, the stirring device is driven by the stirring driver so that the sludge can be quickly dried. And during the stirring process, the stirring cylinder is driven by the rotation driver to eccentrically rotate inside the outer box body, thereby turning over the sludge in the stirring cylinder, making the sludge repeatedly fall and beat inside the stirring cylinder by means of the gravity effect, and the sludge is scattered in position inside the stirring cylinder, so that the dried sludge is not easy to agglomerate and the agglomeration rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge drying equipment, and in particular to a treatment equipment for drying steam sludge in a thermal power plant. Background Art

[0002] Most traditional sludge drying methods are through natural air drying, and the drying efficiency is slow. Most drying equipment in the prior art uses plate filter presses for dehydration, such as the Chinese patent CN215756991U published on February 8, 2022, and some also use stirring evaporation drying equipment, such as the Chinese patent CN218561268U published on March 3, 2023.

[0003] However, the sludge after the plate filter press type equipment is mostly in a lump shape and cannot be directly sent into the furnace through the wind as pulverized coal; although the stirring evaporation drying equipment can reduce the caking rate through stirring, since the path of the stirring rod is unchanged and there must be gaps between the stirring rods, there will still be areas that cannot be stirred, and the sludge in these areas is still prone to caking. Summary of the Invention

[0004] The purpose of the present invention is to provide a treatment equipment for drying steam sludge in a thermal power plant, which can effectively reduce the caking rate of dried sludge;

[0005] The present invention provides a treatment equipment for drying steam sludge in a thermal power plant, including an outer box body. A stirring cylinder is arranged inside the outer box body, a stirring column is arranged inside the stirring cylinder, and a plurality of stirring devices are arranged on the stirring column; a stirring driver is arranged on one side of the outer box body, and the output end of the stirring driver is connected to the stirring column; a rotation driver is arranged on one side of the outer box body, and the output end of the rotation driver is eccentrically connected to the stirring cylinder, and there is a space for the eccentric rotation of the stirring cylinder inside the outer box body; the outer box body includes a heating layer.

[0006] Further, a rotating wheel plate is arranged outside the end of the stirring cylinder, a rotating shaft is coaxially arranged through the stirring cylinder, and the front end of the rotating shaft is eccentrically connected to the rotating wheel plate, and the rotating wheel plate is connected to the rotation driver through gear meshing.

[0007] Further, an annular track is arranged on the inner wall of the end of the outer box body, the rear end of the rotating shaft penetrates through the stirring cylinder and is inserted into the annular track, and the annular track has the same shape as the eccentric movement track of the rotating shaft.

[0008] Further, the stirring column is a roller rotatably sleeved outside the rotating shaft. The front end of the stirring column penetrates through the stirring cylinder and is connected with a driven gear. A driving gear is coaxially and rotatably connected to the rotating wheel plate. The driving gear meshes with the driven gear, and the output end of the stirring driver is connected with the driving gear.

[0009] Further, an end cover is detachably arranged at the end of the stirring cylinder, and a sludge inlet or a powder outlet is arranged on the end cover.

[0010] Further, the stirring device includes connecting rods and spreading rods. A plurality of the connecting rods are respectively arrayed along the circumferential and axial directions of the stirring column. The spreading rods are connected to the ends of the connecting rods, and the spreading rods can slide axially relative to the connecting rods.

[0011] Further, a chute is arranged on one side of the spreading rod adjacent to the connecting rod. The end of the connecting rod is slidably inserted into the chute, and a spring is arranged between the end of the connecting rod and the bottom of the chute.

[0012] Further, the outer box body further includes a water tank layer and a condensation layer. The water tank layer is located inside the heating layer, and the condensation layer is located outside the heating layer.

[0013] Further, a circulating pump is arranged outside the outer box body. The input end of the circulating pump is communicated with the condensation layer, and the output end of the circulating pump is communicated with the water tank layer.

[0014] Further, a water tank interface penetrating into the water tank layer is arranged on the outer box body, and a valve is arranged on the water tank interface; a condensation interface penetrating into the condensation layer is arranged on the outer box body, and a one-way valve is arranged on the condensation interface. External air can enter the condensation layer through the one-way valve.

[0015] In the technical solution of the present invention, the stirring device is driven to rotate by the stirring driver to stir the sludge in the stirring cylinder, and the stirring cylinder is heated by the heating layer so that the sludge can be quickly dried; and during the stirring process, the stirring cylinder is driven to eccentrically rotate in the outer box body by the rotating driver, so as to turn over the sludge in the stirring cylinder, and the sludge is repeatedly beaten in the stirring cylinder by means of the gravity, and the sludge is scattered in the stirring cylinder, so that the dried sludge is not easy to agglomerate and the agglomeration rate is reduced. Description of the Drawings

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Schematic diagram of the overall structure of the present invention;

[0019] Figure 3 Top view of the present invention;

[0020] Figure 4 For the present invention Figure 3 Sectional view taken along line A-A of;

[0021] Figure 5 For the present invention Figure 3 Sectional view taken along line B-B of;

[0022] Figure 6 For the present invention Figure 5 Schematic diagram of the three-dimensional structure of;

[0023] Figure 7 Side view of the present invention;

[0024] Figure 8 For the present invention Figure 7 Sectional view taken along line A-A of;

[0025] Figure 9 Schematic diagram of the internal structure of the present invention;

[0026] Figure 10 Schematic diagram of the stirring device structure of the present invention;

[0027] Explanation of reference numerals:

[0028] 1 - Outer box body, 101 - Water tank layer, 102 - Heating layer, 103 - Condensation layer, 104 - Water tank interface, 105 - Condensation interface, 106 - Ring track, 2 - Stirring cylinder, 201 - End cover, 202 - Sludge inlet or powder outlet, 3 - Stirring column, 301 - Driven gear, 4 - Stirring device, 401 - Connecting rod, 402 - Spreading rod, 403 - Chute, 404 - Spring, 5 - Stirring driver, 6 - Rotating driver, 7 - Rotating wheel plate, 701 - Shaft rod, 702 - Shaft seat, 703 - Driving gear, 8 - Rotating shaft, 801 - Bearing, 9 - Support seat, 10 - Circulation pump; Specific embodiments

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] Embodiment 1

[0033] As Figures 1 - 10 shown, the present invention provides a processing device for drying steam sludge in a thermal power plant, which includes an outer box body 1. A stirring cylinder 2 is arranged inside the outer box body 1. A stirring column 3 is arranged inside the stirring cylinder 2. A number of stirring devices 4 are arranged on the stirring column 3. A stirring driver 5 is arranged on one side of the outer box body 1. The output end of the stirring driver 5 is connected to the stirring column 3. A rotation driver 6 is arranged on one side of the outer box body 1. The output end of the rotation driver 6 is eccentrically connected to the stirring cylinder 2. There is a space for the eccentric rotation of the stirring cylinder 2 inside the outer box body 1. The outer box body 1 includes a heating layer 102.

[0034] Specifically, the interior of the outer box body 1 is a cylindrical hollow structure, the mixing drum 2 is a cylindrical structure, and the outer diameter of the mixing drum 2 is smaller than the inner diameter of the outer box body 1. The mixing drum 2 is eccentrically arranged in the outer box body 1 and abuts against the inner wall of the outer box body 1. Thus, during the eccentric movement of the mixing drum 2, the outer wall of the mixing drum 2 rolls over the inner wall of the outer box body 1. During the rolling contact process, the temperature of the heating layer 102 is transferred to the mixing drum 2, thereby evaporating and drying the sludge in the mixing drum 2.

[0035] The eccentric rotation of the mixing drum 2 is driven by the rotation driver 6. And while the mixing drum 2 rotates eccentrically, the mixing driver 5 drives the mixing column 3 in the mixing drum 2 to rotate, and further rotates the mixing device 4 to stir the sludge, so that the sludge can be quickly evaporated and dried.

[0036] The mixing device 4 is driven by the mixing driver 5 to rotate to stir the sludge in the mixing drum 2, and the mixing drum 2 is heated by the heating layer 102, so that the sludge can be quickly dried. And during the stirring process, the rotation driver 6 drives the mixing drum 2 to rotate eccentrically in the outer box body 1, thereby turning over the sludge in the mixing drum 2. With the help of the gravity, the sludge is repeatedly beaten in the mixing drum 2, and the sludge is scattered in the mixing drum 2, so that the dried sludge is not easy to agglomerate and the agglomeration rate is reduced.

[0037] Embodiment 2

[0038] As Figures 1 - 3 and Figures 5 - 9 shown, a rotating wheel plate 7 is provided outside the end of the mixing drum 2. A rotating shaft 8 is coaxially penetrated through the mixing drum 2. The front end of the rotating shaft 8 is eccentrically connected to the rotating wheel plate 7. The rotating wheel plate 7 is connected to the rotation driver 6 through gear meshing. An annular track 106 is provided on the inner wall of the end of the outer box body 1. The rear end of the rotating shaft 8 penetrates through the mixing drum 2 and is inserted into the annular track 106. The annular track 106 has the same shape as the eccentric movement track of the rotating shaft 8. The mixing column 3 is a roller rotatably sleeved outside the rotating shaft 8. The front end of the mixing column 3 penetrates through the mixing drum 2 and is connected with a driven gear 301. A driving gear 703 is coaxially rotatably connected to the rotating wheel plate 7. The driving gear 703 meshes with the driven gear 301. The output end of the mixing driver 5 is connected to the driving gear 703. A detachable end cover 201 is provided at the end of the mixing drum 2. A sludge inlet or a powder outlet 202 is provided on the end cover 201.

[0039] Specifically, the rotating wheel plate 7 is coaxial with the cylindrical inner wall of the outer box body 1. The rotating shaft 8 is fixedly connected to an eccentric position of the rotating wheel plate 7, and the mixing cylinder 2 is sleeved outside the rotating shaft 8. Therefore, during the eccentric movement of the rotating shaft 8, the mixing cylinder 2 is driven to perform eccentric movement. If the mixing cylinder 2 is rotatably sleeved on the rotating shaft 8, then during the eccentric movement of the rotating shaft 8, the mixing cylinder 2 rolls and contacts the inner wall of the outer box body 1; if the mixing cylinder 2 is fixedly sleeved on the rotating shaft 8, then during the eccentric movement of the rotating shaft 8, the mixing cylinder 2 slides and contacts the inner wall of the outer box body 1.

[0040] Since the weight load of the mixing cylinder 2 is on the rotating shaft 8, the two ends of the rotating shaft 8 should be supported for the eccentric trajectory. Among them, the front end of the rotating shaft 8 has been fixed on the rotating wheel plate 7 for support; and the rear end is inserted into the annular track 106. The annular track 106 is a groove structure, opened on the inner wall of the end of the outer box body 1. Its shape and contour are the same as the movement trajectory of the eccentric position on the rotating wheel plate 7, and the rear end of the rotating shaft 8 rolls in the annular track 106 through a bearing 801. Thus, the two ends of the rotating shaft 8 are supported for the eccentric trajectory.

[0041] The outer edge of the rotating wheel plate 7 is a gear structure, and one side is connected to the rotating driver 6 through gear meshing. Thus, the rotating driver 6 drives the rotating wheel plate 7 to rotate. The rotating driver 6 can specifically select a motor, which is clamped and fixed by the support base 9.

[0042] A rotating connecting rod 701 is coaxially and rotatably penetrated through the rotating wheel plate 7. The rod 701 is respectively connected to the mixing driver 5 and the driving gear 703 at both sides of the rotating wheel plate 7. The rod 701 is rotatably fixed on the shaft seat 702 to realize the support of the rotating wheel plate 7, and further realize the support of the rotating shaft 8. The mixing column 3 with a roller structure is sleeved on the rotating shaft 8 and performs eccentric movement along with the rotating shaft 8. And the front end of the mixing column 3 extends out of the mixing cylinder 2 and meshes with the driving gear 703 through the driven gear 301. Thus, the mixing driver 5 can drive the mixing column 3 to rotate while the mixing column 3 performs eccentric movement, and further drive the mixing device 4 to mix the sludge. The mixing driver 5 can specifically select a motor, which is clamped and fixed by the support base 9.

[0043] The front end of the mixing drum 2 is detachably closed by an end cover 201. By removing the end cover 201, the internal mixing device 4 can be overhauled, or the dry sludge can be cleaned into the mixing drum 2. For example, the specific disassembly method is that the end cover 201 can be slidably arranged outside the mixing column 3, and the end cover 201 is locked against the edge of the mixing drum 2 by a nut; or the edge of the end cover 201 is a stepped structure, and pin holes are respectively provided on the outer edge of the front end of the mixing drum 2 and the stepped part of the end cover 201. When the end cover 201 is buckled to the end of the mixing drum 2, a fixing pin is inserted into the pin hole to fix the end cover 201 so that it cannot be separated from the mixing drum 2. In addition, an inclined sludge inlet or powder outlet 202 can be provided on the end cover 201 to add sludge into the mixing drum 2 or lead out the dry powder in the mixing drum 2 through a negative pressure air duct, etc.

[0044] Embodiment 3

[0045] As Figure 10 shown, the mixing device 4 includes a connecting rod 401 and a spreading rod 402. A plurality of connecting rods 401 are respectively arrayed along the circumferential and axial directions of the mixing column 3. The spreading rod 402 is connected to the end of the connecting rod 401, and the spreading rod 402 can slide axially relative to the connecting rod 401. A chute 403 is provided on the side of the spreading rod 402 adjacent to the connecting rod 401. The end of the connecting rod 401 is slidably inserted into the chute 403, and a spring 404 is provided between the end of the connecting rod 401 and the bottom of the chute 403.

[0046] Specifically, the outer end of the spreading rod 402 is an arc surface structure that can fit the inner wall of the mixing drum 2. Thus, during the mixing process, the spreading rod 402 can scrape the inner wall of the mixing drum 2 to prevent sludge from adhering to the inner wall of the mixing drum 2 and caking. The end of the connecting rod 401 is inserted into the chute 403 of the spreading rod 402. Thus, when the amount of sludge in the mixing drum 2 is large, the spreading rod 402 compresses the spring 404 and retracts a certain length, reducing the mixing radius and the load on the mixing drive 5. After mixing and drying for a period of time, the humidity of the sludge decreases and the viscosity decreases, so it is not easy to compress the spring 404 again. The spring 404 gradually recovers and pushes out the spreading rod 402 to scrape the sludge adhering to the inner wall of the mixing drum 2.

[0047] Embodiment 4

[0048] As Figures 1 - 9As shown in the figure, the outer box body 1 further includes a water tank layer 101 and a condensation layer 103. The water tank layer 101 is located inside the heating layer 102, and the condensation layer 103 is located outside the heating layer 102. A circulation pump 10 is provided outside the outer box body 1. The input end of the circulation pump 10 is communicated with the condensation layer 103, and the output end of the circulation pump 10 is communicated with the water tank layer 101. A water tank interface 104 penetrating into the water tank layer 101 is provided on the outer box body 1, and a valve is provided on the water tank interface 104; a condensation interface 105 penetrating into the condensation layer 103 is provided on the outer box body 1, and a one-way valve is provided on the condensation interface 105. External air can enter the condensation layer 103 through the one-way valve (not shown).

[0049] Specifically, the outer box body 1 is composed of a water tank layer 101, a heating layer 102, and a condensation layer 103 from the inside to the outside. The heating layer 102 can be, for example, an electric heating layer 102 structure such as a resistance wire mesh, which is used to provide the sludge evaporation temperature. The heating layer 102 heats the water in the water tank layer 101 to make the water tank layer 101 provide a constant temperature, and transfers the heat to the eccentrically rotating stirring cylinder 2 through the water tank layer 101 for evaporation and drying. The evaporation steam in the stirring cylinder 2 can overflow through the openings on the end cover 201.

[0050] The condensation layer 103 is used to recover part of the heat of the heating layer 102 and recover water resources to avoid heat waste. Specifically, when the heating layer 102 is heating, the air temperature in the condensation layer 103 is synchronously increased. When it is higher than the external air temperature, heat exchange occurs between the condensation layer 103 and the outside. The hot air in the condensation layer 103 will release heat and condense to produce condensed water. These condensed waters are supplemented into the water tank layer 101 through the circulation pump 10. The interface of the circulation pump 10 and the condensation layer 103 is located at the bottom of the condensation layer 103. After the air in the condensation layer 103 condenses, the pressure decreases. At this time, under the action of the atmospheric pressure, the evaporation steam of the sludge evaporating to the outside is pressed into the condensation layer 103 through the one-way valve to supplement the air in the condensation layer 103 and continue the condensation process. When the water in the water tank layer 101 is full, a part can be discharged through the water tank interface 104 for other uses, such as industrial water for thermal power plants, etc. Thus, part of the heat of the heating layer 102 is recovered, and the water resources in the sludge are recovered.

[0051] The working principle of this device:

[0052] The stirring device 4 is driven to rotate by the stirring driver 5 to stir the sludge in the stirring cylinder 2, and the stirring cylinder 2 is heated by the heating layer 102 so that the sludge can be quickly dried; and during the stirring process, the stirring cylinder 2 is driven to rotate eccentrically in the outer box body 1 by the rotation driver 6, so as to turn over the sludge in the stirring cylinder 2. With the help of the gravity, the sludge is repeatedly beaten in the stirring cylinder 2, and the sludge is scattered in the stirring cylinder 2, so that the dried sludge is not easy to agglomerate and the agglomeration rate is reduced.

[0053] The water tank layer 101 is heated by the heating layer 102 to provide an evaporation temperature for the stirring cylinder 2 that moves eccentrically. Part of the heat of the heating layer 102 is recovered by the condensation layer 103, and part of the water resources evaporated from the sludge to the outside is recovered.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A treatment device for steam sludge drying in a thermal power plant, characterized in that, It includes an outer box body, inside which there is a mixing cylinder, inside the mixing cylinder there is a mixing column, and several mixing devices are arranged on the mixing column; On one side of the outer box body, there is a mixing drive, and the output end of the mixing drive is connected to the mixing column; On one side of the outer box body, there is a rotation drive, and the output end of the rotation drive is eccentrically connected to the mixing cylinder. There is a space in the outer box body for the eccentric rotation of the mixing cylinder; The outer box body includes a heating layer; The mixing device includes connecting rods and spreading rods. Several of the connecting rods are respectively arrayed along the circumferential and axial directions of the mixing column. The spreading rods are connected to the ends of the connecting rods, and the spreading rods can slide axially relative to the connecting rods; On the side of the spreading rod adjacent to the connecting rod, there is a chute. The end of the connecting rod is slidably inserted into the chute, and a spring is arranged between the end of the connecting rod and the bottom of the chute; The outer end of the spreading rod is an arc surface structure that fits the inner wall of the mixing cylinder.

2. The treatment equipment for drying steam sludge in a thermal power plant according to claim 1, wherein Outside the end of the mixing cylinder, there is a rotating wheel plate. A rotating shaft is coaxially arranged through the mixing cylinder, and the front end of the rotating shaft is eccentrically connected to the rotating wheel plate. The rotating wheel plate is connected to the rotation drive through gear meshing; 3. The treatment equipment for drying steam sludge in a thermal power plant according to claim 2, characterized in that, On the inner wall of the end of the outer box body, there is an annular track. The rear end of the rotating shaft passes through the mixing cylinder and is inserted into the annular track. The annular track has the same shape as the eccentric movement track of the rotating shaft; 4. The processing equipment for drying steam sludge in a thermal power plant according to claim 2, wherein The mixing column is a roller rotatably sleeved outside the rotating shaft. The front end of the mixing column passes through the mixing cylinder and is connected with a driven gear. A driving gear is coaxially and rotatably connected to the rotating wheel plate. The driving gear meshes with the driven gear, and the output end of the mixing drive is connected to the driving gear; 5. The processing equipment for drying steam sludge in a thermal power plant according to claim 4, characterized in that, The end of the mixing cylinder is detachably provided with an end cover, and a sludge inlet or a powder outlet is arranged on the end cover; 6. The treatment equipment for steam sludge drying in a thermal power plant according to claim 1, characterized in that, The outer box body also includes a water tank layer and a condensation layer. The water tank layer is located inside the heating layer, and the condensation layer is located outside the heating layer; 7. The treatment equipment for drying steam sludge in a thermal power plant according to claim 6, wherein, Outside the outer box body, there is a circulation pump. The input end of the circulation pump is communicated with the condensation layer, and the output end of the circulation pump is communicated with the water tank layer; 8. The treatment equipment for drying steam sludge in a thermal power plant according to claim 7, characterized in that On the outer box body, there is a water tank interface penetrating into the water tank layer, and a valve is arranged on the water tank interface; on the outer box body, there is a condensation interface penetrating into the condensation layer, and a one-way valve is arranged on the condensation interface. External air can enter the condensation layer through the one-way valve.

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